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May 21 settlement recap — Iran deal snags on uranium, crude extends slide; corn exports surge 71% but grains fall anyway
WTI slid –1.94% to $96.35 and Brent –2.32% to $102.58 as Khamenei's refusal to surrender enriched uranium stalled Iran peace talks. Gold edged up +0.19% to $4,539.80 on DXY softness, decoupling from crude risk. Despite a 4-month-high USDA corn export sales print (+71% vs. 4-week avg), corn and soybeans fell on China's absence from the US market. Copper dipped –0.53% to $6.2570 on SHFE inventory signals. US Flash PMI surged to a 4-year high; Eurozone contracted sharply.
Khamenei's refusal to surrender near-weapons-grade enriched uranium killed whatever momentum the "narrowed gaps" headline had given crude. WTI lost another 1.9% to $96.35, Brent another 2.3% to $102.58 — two sessions, roughly 8% of crude's value erased. Gold held, even gained slightly, as it tracked a softening dollar rather than the Iran news cycle. Grains got the strongest USDA corn export sales figure since January — and still closed lower. That's the read from Thursday's session.
Quick-scan: May 21 settlements
| Commodity | Contract | Settlement | Change | % |
|---|---|---|---|---|
| Gold | COMEX Jun'26 (GCM6) | $4,539.80/oz | +$8.50 | +0.19% |
| WTI Crude | NYMEX Jul'26 (CLN6) | $96.35/bbl | –$1.91 | –1.94% |
| Brent Crude | ICE Jul'26 (BZN6) | $102.58/bbl | –$2.44 | –2.32% |
| Corn | CBOT Jul'26 (ZCN6) | 463.75¢/bu | –2.00¢ | –0.43% |
| Soybeans | CBOT Jul'26 (ZSN6) | 1194.25¢/bu | –5.50¢ | –0.46% |
| Copper | COMEX Jul'26 (HGN6) | $6.2570/lb | –$0.0335 | –0.53% |
Prior-session baselines: gold $4,535.30, WTI $98.26 (CLN6 is now front-month after CLM6 expired May 20), Brent $105.02, corn 465.75¢, soybeans 1199.75¢, copper $6.2905.
Crude oil: uranium sticking point, Hormuz regime formalized, Russia exports collapse
NYMEX WTI July'26 settled at $96.35/bbl, down $1.91 (–1.94%) 1, extending Wednesday's 4.2% drop. ICE Brent July'26 closed at $102.58/bbl, down $2.44 (–2.32%) 2, its lowest close since early May. The two-day combined WTI decline is now roughly $3.83 (–3.8%).
The day's Iran narrative had two competing threads. The constructive side: Iran's foreign ministry confirmed it is "reviewing" the latest U.S. proposal and said it had "narrowed the gaps," 3 and Pakistan's interior minister arrived in Tehran Wednesday with Army Chief Asim Munir traveling to deliver a fresh U.S. message 4. The hard stop: Supreme Leader Khamenei stated publicly that Iran will not surrender its near-weapons-grade enriched uranium stockpile — a condition the U.S. calls non-negotiable 5. Trump said talks were "borderline" between negotiations and renewed strikes, adding he was willing to wait a couple of days for a satisfactory answer 4. Polymarket's probability of a permanent U.S.–Iran peace deal by June 30 sat at 39%, down roughly 25 percentage points from its recent peak 5.
While the talks stalled, Iran formalized its new Hormuz transit architecture. The IRGC (Islamic Revolutionary Guard Corps) reported 26 commercial vessels — tankers and container ships — transited under Iranian coordination in the prior 24 hours 6, well below the pre-conflict rate of roughly 135 vessels per day. Iran's newly created Persian Gulf Strait Authority (PGSA) announced a tiered approval regime: vessels tied to China and Russia get priority; those associated with the U.S. or Israel are barred; others must obtain government-to-government agreements or direct IRGC approval. Transit fees of up to $200,000 per vessel have been reported, with an IRGC-backed "Hormuz Safe" insurance platform — accepting Bitcoin — pitched as generating over $10 billion annually 7. Secretary of State Rubio called the fee mechanism "completely unacceptable" 8 and UAE presidential adviser Anwar Gargash described Iran's Hormuz control ambitions as "pipe dreams" 4.
John Kilduff of Again Capital put a structural floor under the price outlook: "Whatever happens, I see WTI holding at $85 and above in the distant future, and Brent at $90 and above." 1 Ritterbusch & Associates added that the current whipsaw "could continue to play out in the coming weeks until some framework of a deal is achieved that could, at least, provide for a partial reopening of the Strait of Hormuz." 1
On supply: Russia's waterborne crude exports for May have averaged approximately 2.78 million bpd, down sharply from April's 4.46 million bpd — a 37.7% fall — as Ukraine's drone campaign continued to damage refining capacity. 9 Wednesday night's strikes hit the Norsi refinery in Nizhny Novgorod (capacity ~340,000 bpd) for the second time this week and the Syzran refinery (capacity ~160,000 bpd) 9; Reuters reported roughly one-quarter of Russia's total refining capacity has been forced offline 9. A second 30-day U.S. sanctions-relief extension — through June 17 — was announced by Treasury Secretary Bessent, though it retains the April 17 loading cutoff, limiting its practical benefit for Russia 9.
The EIA's record drawdown data from Wednesday — commercial crude –7.9 mb to 445 mb, SPR –9.9 mb to 374.2 mb (largest single-week SPR draw on record, seventh consecutive weekly decline) 10 — remained a bullish underpinning, but geopolitical relief headlines clearly carry more weight in the near term.
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Gold: decoupling from Iran risk, tracking dollar instead
COMEX June'26 gold (GCM6) settled at $4,539.80/oz, up $8.50 (+0.19%) 11 — a second consecutive gain and the first back-to-back advance since early May. The two-session move totals +$33.50 (+0.74%). Intraday, gold dipped to around $4,512–4,517 in early Asian trading before recovering through the European session 12.
IC Markets noted that gold "continued to trade more closely in line with US dollar movements" rather than traditional safe-haven flows — a regime shift from earlier in the conflict 12. The driver was the dollar: DXY fell 0.19% to 99.14, from 99.38 on May 20 12. The 10-year Treasury yield eased roughly 8 basis points to approximately 4.586%, and the 2-year dropped 6.3 bp to 4.055% 12, both providing modest relief for the non-yielding metal.
The FOMC's hawkish overhang remains the main ceiling. Wednesday's minutes showed an 8-4 dissent split — the widest since 1992 — with a majority backing rate hikes if inflation persists 13. CME FedWatch placed just 2.6% odds on a June rate cut, with 97.4% pricing rates unchanged at 3.50–3.75% 13. Kevin Warsh is set to be sworn in as Federal Reserve chair by President Trump on Friday, May 22 14; his first FOMC meeting as chair will be in June.
Structurally, Goldman Sachs estimates central banks are purchasing at least 60 tonnes of gold per month in 2026, up from roughly 50 tonnes per month through March 15, an ongoing floor for the metal even as ETF outflows and hawkish policy pressure from the top.
Corn and soybeans: strongest corn export sales in four months, market still falls
CBOT July'26 corn (ZCN6) settled in the range of 463¢–463.75¢/bu, a decline of roughly 2–3.5¢ (approximately –0.4% to –0.75%) from Wednesday's 465.75¢ 1617; multiple sources show slightly different final prints, and the precise settlement will be confirmed in CME's end-of-day data. CBOT July'26 soybeans (ZSN6) closed at 1194.25¢/bu, off 5.50¢ (–0.46%) 18. July CBOT wheat lost 13¢ (–1.97%) to 647.5¢ — the steepest percentage loss among grains Thursday.
The USDA's weekly export sales report, released Thursday morning (covering the week ended May 14), delivered an unambiguously bullish corn figure. Old-crop corn net sales reached 2,125,300 metric tons — 71% above the four-week average, the strongest weekly print since mid-January, and beyond the upper bound of analyst estimates of 800,000–1,600,000 MT 19. The Brock Report called the number "well above" trade expectations 20, with Japan (779,800 MT) and South Korea (463,800 MT) as the lead buyers. Cumulative corn export commitments now stand at 3.145 billion bushels, up 26% year-on-year and running well ahead of USDA's full-year forecast of +15.5% 19.
Soybean sales also rebounded: old-crop net sales of 351,400 MT were 62% above the four-week average and ended a stretch of marketing-year lows 19. Grain Market Insider described it as "a general risk-off day for grains" and said long liquidation "appeared to remain in control of the market" despite the bullish export data 17.
Three headwinds overrode the export data:
China's non-appearance. There were no new Chinese purchases of U.S. soybeans or corn this week 21. China instead bought Brazilian soybeans, where a price advantage persists 21. The White House's $17 billion per year aggregate agriculture pledge (covering the 2026–2028 period, confirmed by the White House on May 18) 22 has not been formally acknowledged by Beijing's MOFCOM, and this week produced zero new flash purchase announcements. USTR Jamieson Greer described the pledge as covering "aggregate" products — "soybeans, beef, grains, dairy, all kinds of things" — leaving soybean-specific allocation uncertain 22. DTNPF's analysis framed the situation bluntly: "It's anybody's guess as to where we go from here, but funds are sure hoping China puts on their buying shoes." 18
Argentina's harvest surge. BAGE (the Buenos Aires Grains Exchange) raised its 2025/26 Argentina corn forecast by 3 MMT to 64 MMT, versus USDA's current estimate of 59 MMT — the largest gap between the two estimates in recent history 23. BAGE also raised Argentina soybean production by 1.5 MMT to 50.1 MMT (USDA: 48 MMT) 23. ADM Investor Services observed BAGE is "once again forging a gap with the USDA forecast," implying potential upward USDA revisions in June's WASDE.
Favorable Midwest weather. NWS's 8-14 day outlook for most of the Corn Belt calls for warmer and wetter than normal conditions 24, and Reuters cited Vaisala data showing recent rains have already boosted Midwest soil moisture ahead of early germination 25. Corn planting was at 76% complete as of May 17, soybeans at 67% 24; the pace is running well above average, removing weather-premium from near-dated contracts.
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The structural positioning risk in soybeans: managed money is still carrying what DTNPF called a "monstrously large net long" in the soy complex. According to DTNPF's Dana Mantini, a clean close below the $11.75–$11.80 level on July soybeans "could result in some serious liquidation of those longs" 18. July closed at $11.9425 Thursday, leaving roughly 16 cents of cushion above that trigger.
Copper: profit-taking after 5th-highest close; China demand softens
COMEX July'26 copper (HGN6) settled at $6.2570/lb, off $0.0335 (–0.53%) 26, its fourth decline in the past six sessions. The settlement is still the seventh-highest close of 2026; copper is off 5.7% from its record of $6.6355 set May 13 but up 44.5% from its 52-week low of $4.3305 (July 31, 2025). Year-to-date gain: +11.1%.
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Thursday's retreat reflects two demand-side signals from China. SHFE (Shanghai Futures Exchange) copper warrant inventories rose to 97,011 tonnes as of May 14, reversing a drawdown that had run since mid-March — a reversal that Discovery Alert called "a clear signal of weakening Chinese demand" 27. Additionally, Chinese spot copper shifted from trading at a premium over SHFE futures to a discount, indicating buyers are unwilling to pay for immediate delivery 27. China's April factory output growth of 4.1% year-on-year (versus 5.7% in March) is consistent with this softer demand read.
The structural backdrop remains tight. ICSG projects a 2026 refined copper deficit of 150,000–450,000 tonnes 27, and near-term supply cuts are in the pipeline: CSPT (China Smelters Purchase Team) has signaled production cuts of more than 10% with benchmark treatment/refining charges (TC/RC) now at $0/tonne. Nvidia's Q1 FY2027 results — $81.6 billion in revenue (+85% year-on-year), including $75.2 billion from data centers 28 — are a medium-term positive for copper demand through AI infrastructure buildout, but NVDA's 1.26% after-hours decline (a third consecutive post-earnings selloff) contributed to the risk-off mood rather than supporting copper Thursday.
Macro overlay: US manufacturing at 4-year high, Europe slides into contraction
The day's standout macro release was the S&P Global Flash PMI suite, which laid out a stark transatlantic divergence:
| Region | Index | May reading | Prior | vs. estimate |
|---|---|---|---|---|
| United States | Manufacturing | 55.3 | 54.5 | beat (est. 53.8) |
| United States | Services | 50.9 | 51.0 | miss (est. 51.2) |
| United States | Composite | 51.7 | 51.7 | flat |
| Eurozone | Composite | 47.5 | 48.8 | contraction |
| United Kingdom | Composite | 48.5 | 52.6 | contraction |
| Japan | Composite | 51.1 | 52.2 | 5-month low |
Anadolu Agency noted the Eurozone contraction was driven by a sharp services decline, with the Iran war cited as suppressing demand via elevated energy costs 30. The UK Composite PMI's drop to 48.5 from 52.6 was its steepest one-month decline since early 2020, with services crashing to 47.9 — the worst contraction since February 2021 — and Q2 GDP projected to contract 0.2% 32. Japan's input costs rose at the fastest pace since late 2022 and output prices hit a 19-year survey high, driven by Middle East supply-chain disruptions 31.
S&P Global's headline for the U.S. composite: "subdued growth in May amid price surge" — manufacturing is running hot but price acceleration is becoming the more pressing signal 29. Initial jobless claims for the week ending May 17 came in at 209,000, below the 210,000 consensus and down from 212,000 the prior week 14, keeping higher-for-longer expectations intact.
FXStreet's Valeria Bednarik summed up the market's hierarchy: "War headlines are likely to continue overshadowing macroeconomic releases, with the latest likely to have a temporary impact on price action." 33
Friday's watchlist
- Iran deal: Warsh's White House swearing-in Friday morning competes for attention with any overnight Iran developments. Polymarket still prices a deal by June 30 at 39%; the Khamenei uranium line is the key variable to watch, not the Pakistani mediation timeline 5.
- Kevin Warsh: The new Fed chair's first public remarks — expected at the White House ceremony — will be parsed for any tone shift on inflation and the rate path 14. Warsh is perceived as hawkish; any signal of comfort with higher rates would pressure gold and commodities.
- Soybean $11.75–$11.80 support: July soybeans closed at $11.9425, roughly 16 cents above DTNPF's identified liquidation trigger. A close below $11.80 on Friday could accelerate fund selling given the outsized managed-money long 18.
- Copper demand check: The Yangshan copper premium (last known: ~$65/tonne, a multi-year low) and SHFE warrant inventory changes are the near-term indicators for whether China's spot discount is deepening or stabilizing 27.
- Memorial Day liquidity: CME closes Monday, May 25 for Memorial Day. Friday's session will likely see reduced positioning, with traders reluctant to carry outsized Iran exposure into a three-day weekend.
References
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- 11Comex Gold Settles 0.19% Higher at $4539.80 — Data Talk
morningstar.com
- 12General Market Analysis – 21/05/26
icmarkets.com
- 13XAUUSD Today: Gold at $4,521 as Hawkish FOMC Minutes Hit Hard
vantagemarkets.com
- 14United States Initial Jobless Claims
investing.com
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- 16Corn Jul '26 Futures Price
barchart.com
- 17Thursday, May 21, 2026 — Grains Mixed
agriculture.com
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- 19USDA export sales show strong corn rebound, mixed results
farmprogress.com
- 20Big week for old crop corn export sales, others also rise
brownfieldagnews.com
- 21Soybeans, corn, wheat decline on risk-off sentiment, weather
brownfieldagnews.com
- 22China commits to at least $17 billion in ag buys a year
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- 24TFM Daily Market Summary 05-21-2026
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- 26Comex Copper Settles 0.53% Lower at $6.2570 — Data Talk
morningstar.com
- 27Copper Supply Shortage Meets China Demand Weakness in 2026
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- 28Nvidia Earnings: AI Chip Giant Beats Street Expectations
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- 29US PMI Composite unchanged M/M in May flash reading
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